rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr-20+15+20+ (-15) + 45;
(-25).(-21).4;
-2022+(-569)+(-201)+469+301;
(-31)-101.(-31);
29.(19-13

Question

rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr

anie11042 · Answer

Đáp án:
`-20 + 15 + 20 + (-15) + 45`
`= [(-20) + 20] + [15 + (-15)] + 45`
`= 0 + 0 + 45`
`= 45`
`----`
`(-25) . (-21) . 4`
`= [(-25) . 4] . (-21)`
`= (-100) . (-21)`
`= 2100`
`----`
`-2022 + (-569) + (-201) + 469 + 301`
`= -2022 + [(-569) + 469] + [(-201) + 301]`
`= -2022 + (-100) + 100`
`= -2022 + [(-100) + 100]`
`= -2022 + 0`
`= -2022`
`----`
`(-31) - 101 . (-31)`
`= (-31) . (1 - 101)`
`= (-31) . (-100)`
`= 3100`
`----`
`29 . (19 - 13) - 19 . (29 - 13)`
`= 29 . 19 - 29 . 13 - 19 . 29 + 19 . 13`
`= (29 . 19 - 19 . 29) + (19 . 13 - 29 . 13)`
`= 29 . (19 - 19) + 13 . (19 - 29)`
`= 29 . 0 + 13 . (-10)`
`= 0 - 130`
`= -130`

hongngocnguyen3215 · Answer

1) -20 + 15 + 20 + (-15) + 45
= [ (-20) + 20 ] + [ 15 + (-15) ] + 45
= 0 + 0 + 45
= 0 + 45
= 45
2) (-25) . (-21) . 4
= [ (-25) . 4 ] . (-21)
= (-100). (-21)
= 2100
3) -2022 + (-569) + (-201) + 469 + 301
= -2022 + [ (-569) + 469 ] + [ (-201) + 301 ]
= -2022 + (-100) + 100
= -2022 + [ (-100) + 100)
= -2022 + 0
= -2022
4) (-31) - 101 . (-31)
= (-31) . ( 1 - 101 )
= (-31) . (-100)
= 3100
5) 29 . (19-13) - 19 . (29 - 13)
= 29 . 19 - 29 . 13 - 19 . 29 + 19 . 13
= ( 29 . 19 - 19 . 29) + (19 . 13 - 29 . 13)
= 0 + (-130)
= -130
`------------------`
CHÚC BẠN HỌC TỐT!
`#` hongngocnuyen3215
`#` hoidap247

rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr

TRẢ LỜI

Bạn muốn hỏi điều gì?

Tham Gia Group Dành Cho Lớp 6 Chia Sẻ, Trao Đổi Tài Liệu Miễn Phí

Bạn muốn hỏi điều gì?

Tìm kiếm với hình ảnh

Hãy đăng nhập hoặc tạo tài khoản miễn phí!

Lưu vào

rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr

TRẢ LỜI

Bạn muốn hỏi điều gì?

Tham Gia Group Dành Cho Lớp 6 Chia Sẻ, Trao Đổi Tài Liệu Miễn Phí

Bạn muốn hỏi điều gì?

Lý do báo cáo vi phạm?